Switch.



H. A. STEEN.

SWITCH.

APPLICATION FILED JULY 25. l9l4.

RENEWED SEPT. 2 I. I916.

Ijutented Mar. 27, 1917.

HALFDAN A.

Original application filed September 6, 1910. Serial No. 580,532.

UNITED STATES FATE I T OFFICE.

STEEN, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO ALIIISCHALME BSMANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION 01 SWITCH.

Specification of letters Patent.

Patented Mar. 27, 1917.

Divide d and this application filed July 25,

1914, Serial No. 853,166. Renewed September 28, 1916. Serial No.123,966.

To allwhomz't may concern fi cation.

This invention relates in general to apparatus forinterruptmg electricalcircuits, and

has particular relation tosuch apparatus of the type in which a magneticfield is utilized for extinguishing or suppressing the arc formed on theseparation of the contacts.

It is an object of-this invention to provide. an -improvedcircuit-ln'caking apparatus; which is simple in construction andellicient in operation.

It is a turther object of thisinvention to provide an ble of being realimproved circuit-breaking ap-' nga blow-out magnet capadily detachedfrom operat ve position topermit inspection and repairs-of the contactsor the parts of the magnet.

It is a furthcrobject of this invention to provide an improved circilit-breakin{, apparatus embodyinga blow-out magnet rcmov.

ably held in source of current by a common means.

These and position and connected to a other objects are attained by thisinvention, the various novel :teatures of which w ill appear from thedescription and drawings, disclosing one embodiment of such inventionand w1ll,be particularly pom-ted out in the claims.

In the accompam mg drawings:

Figure 1 is a side elevation of a switch embodying this invention, theswitch as here shown being in closed position.

Fig. 2 is a I front elevationof a portion of the switch shown in Fig. 1.

Fig. 3 is a of Fig. 1.

In the embod sectional view of a detail of iii the plane of the line 3-3iment of the invention illustrated in the drawings, there is mounted,upon a suitable baselO, a frame 11 of magnetic material of. a magnet 12.This frame,

which has three legs 13, 14, and 15, is secured to the base by bolts 16,and has a projection 17 which acts as a stop. The ma net 12 is providedwith an actuating winiing 18 which core 1'; and

surrounds the middle leg or is adapted to attract a. switch actuating,member 19. This switch actuatmg member comprises two members 20 and 21,each of which is pivotally connected to the frame 11 as indicated at22,and protures' 23 and 24 of said switch actuatin member into contactw1tlr their correspon ing engaging faces or surfaces 28 and 29,respectively. of the electromagnet. By means of this arrangenwnt the airgap be-- tween the an mture :21 and its corresponding attracting memberis materially decreased from that of the ordinary arrangement and asteady and gradual pull of the'switch actuating mcirber is thusobtained. This is 30 apparent from the drawings, where it is seen that.af1er the part 20 has been drawn toward the. fixed part of the magnet aslight amount, the pin 25 of said part engages, the part 21 givingthispart an initial start, decreasing its air gap and making the pull of themagnet steady and gradual.

.Mounted in the lower portion of the actuating member 19 is the mainbrush 29.. preferably laminated, and adapted to en gage a stationarycontact 30. which is located at the end of a support 31, the latterbeing secured to the base 10 by bolts 32. (lumped into contact with thebrush 29. 'is a conductor 33, which is connected to a stud 34, thelatter. forming one of the terminals of the switcln Located at the otherend of the switch actu: ting member 19 is an auxiliary contact 35, whichis adapted to engage, with a wiping ac ;ion, a relatively stationarycontact member 36. This contact member is secured to a soring pressedmember 36,, which is pivotally mounted, as shown at 37. The maincontacts are arranged horizontally, breaking vtrtically, and theauxiliary contacts are arranged vertically, breaking hori-' zontally.hose contacts are placed at opposite ends of the switch actuating member19,

" While the ordinary and intended operawith the auxiliary contacts abovethe'main contacts, in order to prevent any damage, which might occur tothe main contacts due to arcs formed when the auxiliary contacts areseparated. 4

In order to destroy arcs formed at the auxiliary contacts when thecircuit is broken, a blow-out magnet 38 is employed. .he coil of thismagnet is wound .on a spool 39 and its ends terminate in knife bladecontacts 40 and 41, respectively, which are adapted to fit incontactsockets 42 and 42,, :s-shown in cross section in Fig. 3. Thectlnfizct sockets are suitably mounted, the S(X'-k(i:t; 42 beingintegral with or connected to a support 45, to which the contactcarrying member 36. is pivoted and-which is secured to the base 10 by abolt 46, 41nd the socket 42 being mounted separately or insulated fromthe support 45, and being. suitzibly connected to the line terminal 47.By using a construction such as this, the blow-out magnet is efficientlysupported in operative position, and can be removed rapidly at any timesimply by drawing out the blow-out magnet with its knife; blade contactsfrom the contactsockets 42, 42., It is thus seen that no screwconnections are used md that the blow-out magnet can be removed rapidlywithout the use of any instruments. This blow-out magnet is provided asusual with poles 50 and- 51, which are so located that the flux betweenthem is directly in thepath of arcs formed avhen the circuit through theauxiliary contacts is broken.

The securing bolt 32 is electrically connected to the bolt 46 through aconductor 48; and the spring-pressed member 36, is preferably} connectedto, the support 45 through a 'fiexible connection 49.

The switch circuits will now be traced. Current enters'at the plusterminal 47, and passes through contact socket 42, knife blade 40,blowmut coil, knife blade 41, and contact socket 42.. At this point, thecircuit divides, one branch including bolt 46, conductor 48, bolt 32,support 31, contact 30, brush 29,, conductor 33, and the minus. terminal34. The other branch includes conductor 49, contact-carrying member 36,,auxiliary contact members 36 and 35, part 21 of the actuating member 19,conductor 33 and minus terminal 34.

It will be apparent that, in accordance with this invention, acircuit-breaking apparatus is )rovided in which a blow-out magnet is e-ciently supported in operative position by means of contact portionsthat are effective to connect the magnet coil in circuit, and can bereadily detached from such operative position to permit free inspectionand repair of the switch contacts and the parts of the blow-out magnet.

tion of the switch structure described does 'ing main anr engagement ofthe parts.

the present invention, such features being claimed in application,'Serial No. 580,532, filed September 6, 191-0, of which application thepresent one is a division.

It should be understood that it'is not desired, to be limited to theexact details of construction shown and described, for ob viousmodifications will occur to apers'on skilled in the art. I

It is claimed and desired to sec1|re-. l )y Let ters. Pa tent 1. Incombination, a switch having fixed and how ble arts, said .movablepartcarryl auxiliary contacts at opposite ends thereof, a cooperating maincontact, and a cooperating pivoted auxiliary contact. 2. In a switch, anactuating member, a contact carried by said actuating member, arelatively stationary contactadapted to be engaged by said movablecontact, and a 'blow-out magnet for destroying arcs formed on theseparation of said contacts and having a detachable switch connectionwith one of said contacts comprisin conductive parts reinovably heldtogether by the frictional 3. In a switch, an actuating member, a

relatively stationary contact member engageable by said movable contact,a blowout magnet for destroying arcs formed on sockets, said blow outmagnet having contact portions'which are detachablyheld'in said contactsocketsthrough the frictional .said latter contacts and the winding ofsaid blow-out magnet, said connection consisting ofparts held togetherby the frictional engagement thereof. 4

5. In a switch, an actuating member, a

contact carried by said actuating member, a relatively stationarycontact engageable by said movable contact, fixed-contactportionsdisposed adjacent said relatively stationary contact'carried bysaidactuating member, a a

I the separation of said contacts, and contact contacts, and a blow-outmagnet for destroying arcs, said blow-out magnet having contactsdetachably retained-in yielding operative engagement with said fixedcontact portions to maintain said blow-out magnet in operative positionwith its operating circuit established and to permit removal of saidblowmut magnet from operative position by forcible withdrawal thereof.

(3. In combination.,a blow-out magnet comprising a core and a winding,and fixed contacts. the terminals of said winding being,

detachably held in engagement with said contacts through the frictionalengagement of said parts, and said cooperative terminals and contactsforming means for detachably securing said magnet in position.

7. In combination with a circuit to be interrupted, a blow-out magnetcomprising a core and a winding. the terminals of said winding beingdetachably held in engagement with portions of said'circuit through thefrictional engagement of said parts.

b. In combination, a switch comprising fixed and movable contacts, and ablow-ont magnet comprising a winding, said magnet being detachablyconnectedin thc circuit controlled by said switch and supported inoperative position through the terminals of said winding and beingremovablefrom operativ position by forcible withdrawal.

9. In combination with a switch, a blow-' out magnet comprising a coreand a winding therefor, and means for removably retaining said magnet inoperative position comprising a fixed contact'portion and a contactportion in electrical engagement with said winding, said contactportions being yieldingly retained in engagement through the frictionalengagement of the parts.

10. In combination with an electrical eir cuit, a switch comprisingfixed and movable contacts, a blow-out magnet comprising a winding, '11)lnrality of additional contacts held in position adjacent the fixedcontact of said switch, one of said additional contacts beingelectrically connected to one of saidswitch contacts and the other'ofsaid additional contacts being connected to a terminal of said circuit,and contact portions in electrical engagement with said winding,

said latter contact portions being removably held in engagement withsaid additional coning, and fixed contacts, the terminals of saidwinding being adapted to frictionally engage and to be detachahly heldby said fixed contacts, and said magnet being removably supported inoperative position by the frictional engagement between said terminalsand said con acts.

12. In combination with a switch, a blowout magnet having a winding withextending terminals. and a plurality of fixed contacts cooperative withsaid terminals, the frictional engagement between said terminals andsaid contacts being effective to support said magnet in operativeposition while permitting ready removal of said magnet by forciblewithdrawal thereof.

7 13. In combination with a switeln il blowout magnet \aving a winding.and a fixed contact. said fixed contact and a terminal of said 'lllt ingbeing .det-achably held together solely by the frictional engagementbetween the parts. and -said magnet being supported in operativeposition, at least in part,througli said winding terminal and said fixedcontact 14. In combination with a switch a blowout magnet, ind means fordetachably supporting said magnet in operative position and connecti 1gthe winding of said magnet in circuit, 5 iid means comprising contactportions'at ;he terminals of the windin and fixed contact portionscooperative wit the terminal :ontact portions,-certain of said contactporti ms being adapted to detachabl retain other'of said contact ortionsthrong 1 the frictional engagement 0? the cotiperative parts and tomaintain saidmagnet in operative position In testimony whereof, thesignature of the inventor is a ilixed hereto in the presence of twowitnesses 4 HALFDAN A. STEEN.

\Vitnesscs WV. H. LIEBER,- J. J KANE.

